stream流对list

List<LinkedHashMap<String, Object>> roomList = new ArrayList<>();

if (StringUtils.isNotBlank(sortField)) {
            List<HashMap<String, Object>> rooms = new ArrayList<>();
            if ("asc".equals(sortStyle)) {
//中文排序
                if ("ConsumerName".equals(sortField) || "AmMeter_Name".equals(sortField)) {
                    rooms = roomList.stream().sorted((a, b) ->
                            Collator.getInstance(Locale.CHINA).compare(a.get(sortField).toString(), b.get(sortField).toString())
                    ).collect(Collectors.toList());
                } else {
//数字排序
                    rooms = roomList.stream().sorted(((o1, o2) -> Double.valueOf(o1.get(sortField).toString()).compareTo(Double.valueOf(o2.get(sortField).toString())))).collect(Collectors.toList());
                }
            } else {
                if ("ConsumerName".equals(sortField) || "AmMeter_Name".equals(sortField)) {
                    rooms = roomList.stream().sorted((a, b) ->
                            Collator.getInstance(Locale.CHINA).compare(b.get(sortField).toString(), a.get(sortField).toString())
                    ).collect(Collectors.toList());
                } else {
                    rooms = roomList.stream().sorted(((o1, o2) -> Double.valueOf(o2.get(sortField).toString()).compareTo(Double.valueOf(o1.get(sortField).toString())))).collect(Collectors.toList());
                }
            }
            map.put("RoomList", rooms);
        } else {
            map.put("RoomList", roomList);
        }
        map.put("sumAfterMulCoefficientValue", sumAfterMulCoefficientValue);